tmuxinator does not update session after editing that session's project

I have a tmuxinator project some-project.

After using it, I updated it with tmuxinator edit some-project. Now when I run tmuxinator start some-project, I get the same session layout as before editing some-project.

How can I make tmuxinator use the new project version?

tmux kill-session -t some-project
tmuxinator start some-project